title: Cobalt monoxide-doped porous graphitic carbon microspheres for supercapacitor application.
abstract: A novel design and facile synthesis process for carbon based hybrid materials, i.e., cobalt monoxide (CoO)-doped graphitic porous carbon microspheres (Co-GPCMs), have been developed. With the synthesis strategy, the mixture of cobalt gluconate, α-cyclodextrin and poly (ethylene oxide)₁₀₆-poly (propylene oxide)₇₀-poly (ethylene oxide)₁₀₆ is treated hydrothermally, followed by pyrolysis in argon. The resultant Co-GPCMs exhibits a porous carbon matrix with localized graphitic structure while CoO nanodots are embedded in the carbon frame. Thus, the Co-GPCMs effectively combine the electric double-layer capacitance and pseudo-capacitance when used as the electrode in supercapacitor, which lead to a higher operation voltage (1.6 V) and give rise to a significantly higher energy density. This study provides a new research strategy for electrode materials in high energy density supercapacitors.
authors.affiliation: Department of Materials Science and Engineering, National University of Singapore, Blk EA, #03-09, 9 Engineering Drive 1, Singapore 117576.
authors.forename: Zheng-Chun
authors.initials: ZC
authors.lastname: Yang
authors.forename: Chun-Hua
authors.initials: CH
authors.lastname: Tang
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhang
authors.forename: Hao
authors.initials: H
authors.lastname: Gong
authors.forename: Xu
authors.initials: X
authors.lastname: Li
authors.forename: John
authors.initials: J
authors.lastname: Wang